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A carboxylic acid can exist in two conformations E and Z that are different by the dihedral angle around the C-O bond. Recent theoretical calculations indicate that the Z conformer of formic acid is 4.04 kcal/mol (Tetrahedron, 2004, 60, 179-185) more stable than the corresponding E conformer. Assuming that the pKa of the Z conformer of formic acid is equal to 3.77, calculate the pKa of the E conformer of formic acid. Assume that ?G=1.4*pKa kcal/mol.
calculate the pressure in atm of 16.80 mol of co2 gas in a 3.00 l vessel at 153 k witha the ideal gas lawb the van der
Fructose contains only C,H, and O. 17.1g of carbon dioxide gas and 7.26 g of water vapor were produced when 12.1 g of solid fructose were combusted with excess of oxygen gas.
How much energy would be absorbed or re- leased by the H2O in the process 30 grams H2O(g) at 100?C → 30 grams H2O(l) at 20?C.
Based upon the intermolecular forces present, rank the following substances according to the expected boiling point for the substance. Rank from highest to lowest boiling point. To rank items as equivalent, overlap them. HCl, NaCl, N2, H2O
A bottle containing 335 of cleaning solution is used for carpets. If the cleaning solution has a specific gravity of 0.850, what volume of solution was used?
one swimmer in a relay race has a 0.485 s lead and is swimming at a constant speed of 3.84 ms. he has 48.5 m to swim
if you have 200.0 g of radioisotope with a half-life of 5 days. how much isotope would remain after 15
A gas mixture with a total pressure of 750 contains each of the following gases at the indicated partial pressures: , 253 ; , 120 ; and , 173 . The mixture also contains helium gas.
How much dry solute would you take to prepare each of the following solutions from the dry solute and the solvent?
calculate the number of moles of AgCrO4(Ksp=9.0x10^12) that will dissolve in 1.00L of 0.010 M K2CrO4 solution. what will be the ion concentrations at equilibrium?
How much thermal energy is evolved by a reaction in a calorimeter in which the temperature of the calorimeter and water increases from 19.50 degrees C to 38.83 degrees C. The calorimeter has a heat capacity of 650 J/degrees C and the calorimeter c..
from the experimental data we obtain i- directly. to obtain ksp for pbi2 we must calculate pb2 in each equilibrium
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